/* =========================
   RESET BÁSICO
========================= */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* =========================
   BODY
========================= */
body {
    font-family: "Segoe UI", Arial, Helvetica, sans-serif;
    background-color: #f4f6f9;
    color: #333;
    line-height: 1.6;
}

/* =========================
   HEADER
========================= */
header {
    background: linear-gradient(135deg, #007bff, #0056d2);
    color: #fff;
    padding: 40px 20px;
    text-align: center;
}

header h1 {
    font-size: 2.4rem;
    margin-bottom: 10px;
}

header p {
    font-size: 1.1rem;
    opacity: 0.95;
}

/* =========================
   BUSCADOR
========================= */
form {
    margin: 40px auto 20px;
    text-align: center;
}

form input {
    padding: 12px 15px;
    width: 280px;
    max-width: 85%;
    border-radius: 8px;
    border: 1px solid #ccc;
    font-size: 1rem;
}

form input:focus {
    outline: none;
    border-color: #007bff;
}

form button {
    padding: 12px 25px;
    margin-left: 8px;
    border-radius: 8px;
    background-color: #007bff;
    color: #fff;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: background 0.2s ease;
}

form button:hover {
    background-color: #0056d2;
}

/* =========================
   LISTADO INSTITUCIONES
========================= */
.listado {
    max-width: 1200px;
    margin: 30px auto;
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 25px;
}

/* =========================
   CARD INSTITUCIÓN
========================= */
.card {
    background: #fff;
    border-radius: 14px;
    padding: 25px 20px;
    text-align: center;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.card img {
    width: 110px;
    height: 110px;
    object-fit: contain;
    margin-bottom: 15px;
    padding: 8px;
    background: #fafafa;
    border-radius: 12px;
    border: 1px solid #eee;
}

.card h4 {
    font-size: 1.1rem;
    color: #333;
    margin-top: 5px;
}

/* =========================
   MENSAJE SIN RESULTADOS
========================= */
.listado p {
    grid-column: 1 / -1;
    text-align: center;
    font-size: 1.1rem;
    color: #777;
}

/* =========================
   FOOTER
========================= */
footer {
    background-color: #002b70;
    color: #fff;
    text-align: center;
    padding: 18px 10px;
    margin-top: 50px;
    font-size: 0.95rem;
}

footer a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
}

footer a:hover {
    text-decoration: underline;
}